diff --git a/Lib/test/test_weakref.py b/Lib/test/test_weakref.py
index 56a42f0..dd5a781 100644
--- a/Lib/test/test_weakref.py
+++ b/Lib/test/test_weakref.py
@@ -422,14 +422,20 @@ def __reversed__(self):
         self.assertEqual("".join(reversed(weakref.proxy(obj))), "cba")
 
     def test_proxy_hash(self):
-        cool_hash = 299_792_458
-
         class MyObj:
             def __hash__(self):
-                return cool_hash
+                return 42
 
         obj = MyObj()
-        self.assertEqual(hash(weakref.proxy(obj)), cool_hash)
+        with self.assertRaises(TypeError):
+            hash(weakref.proxy(obj))
+
+        class MyObj:
+            __hash__ = None
+
+        obj = MyObj()
+        with self.assertRaises(TypeError):
+            hash(weakref.proxy(obj))
 
     def test_getweakrefcount(self):
         o = C()